Which of the following is a factor of 15 + 7x – 2x

^{2}-
**A.**

x + 3 -
**B.**

x – 3 -
**C.**

x – 5 -
**D.**

x + 5

##### Correct Answer: Option C

##### Explanation

Factorize 15 + 7x – 2x^{2}

(5 – x)(3 + 2x); suppose 15 + 7x = 2x^{2} = 0

∴ (5 – x)(3 + 2x) = 0

x = 5 or x = -(frac{3}{2})

Since 5 is a root, then (x – 5) is a factor